#include <iostream>
#include <unordered_map>
#include <unistd.h>
using namespace std;

int main()
{
    fork();
    cout << "hello linux" <<endl;
    cout << "hello linux" <<endl;
    cout << "hello linux" <<endl;
    cout << "hello linux" <<endl;
    cout << "hello linux" <<endl;

    unordered_map<int,int> u;

    return 0;
}